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#ifndef _ASM_M32R_PROCESSOR_H
#define _ASM_M32R_PROCESSOR_H
/*
* include/asm-m32r/processor.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 1994 Linus Torvalds
* Copyright (C) 2001 Hiroyuki Kondo, Hirokazu Takata, and Hitoshi Yamamoto
* Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
*/
#include <linux/kernel.h>
#include <asm/cache.h>
#include <asm/ptrace.h> /* pt_regs */
/*
* Default implementation of macro that returns current
* instruction pointer ("program counter").
*/
#define current_text_addr() ({ __label__ _l; _l: &&_l; })
/*
* CPU type and hardware bug flags. Kept separately for each CPU.
* Members of this structure are referenced in head.S, so think twice
* before touching them. [mj]
*/
struct cpuinfo_m32r {
unsigned long pgtable_cache_sz;
unsigned long cpu_clock;
unsigned long bus_clock;
unsigned long timer_divide;
unsigned long loops_per_jiffy;
};
/*
* capabilities of CPUs
*/
extern struct cpuinfo_m32r boot_cpu_data;
#ifdef CONFIG_SMP
extern struct cpuinfo_m32r cpu_data[];
#define current_cpu_data cpu_data[smp_processor_id()]
#else
#define cpu_data (&boot_cpu_data)
#define current_cpu_data boot_cpu_data
#endif
/*
* User space process size: 2GB (default).
*/
#ifdef CONFIG_MMU
#define TASK_SIZE (0x80000000UL)
#else
#define TASK_SIZE (0x00400000UL)
#endif
#ifdef __KERNEL__
#define STACK_TOP TASK_SIZE
#define STACK_TOP_MAX STACK_TOP
#endif
/* This decides where the kernel will search for a free chunk of vm
* space during mmap's.
*/
#define TASK_UNMAPPED_BASE PAGE_ALIGN(TASK_SIZE / 3)
typedef struct {
unsigned long seg;
} mm_segment_t;
#define MAX_TRAPS 10
struct debug_trap {
int nr_trap;
unsigned long addr[MAX_TRAPS];
unsigned long insn[MAX_TRAPS];
};
struct thread_struct {
unsigned long address;
unsigned long trap_no; /* Trap number */
unsigned long error_code; /* Error code of trap */
unsigned long lr; /* saved pc */
unsigned long sp; /* user stack pointer */
struct debug_trap debug_trap;
};
#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
#define INIT_THREAD { \
.sp = INIT_SP, \
}
/*
* Do necessary setup to start up a newly executed thread.
*/
/* User process Backup PSW */
#define USERPS_BPSW (M32R_PSW_BSM|M32R_PSW_BIE|M32R_PSW_BPM)
#define start_thread(regs, new_pc, new_spu) \
do { \
set_fs(USER_DS); \
regs->psw = (regs->psw | USERPS_BPSW) & 0x0000FFFFUL; \
regs->bpc = new_pc; \
regs->spu = new_spu; \
} while (0)
/* Forward declaration, a strange C thing */
struct task_struct;
struct mm_struct;
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
#define prepare_to_copy(tsk) do { } while (0)
/*
* create a kernel thread without removing it from tasklists
*/
extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
/* Copy and release all segment info associated with a VM */
extern void copy_segments(struct task_struct *p, struct mm_struct * mm);
extern void release_segments(struct mm_struct * mm);
extern unsigned long thread_saved_pc(struct task_struct *);
/* Copy and release all segment info associated with a VM */
#define copy_segments(p, mm) do { } while (0)
#define release_segments(mm) do { } while (0)
unsigned long get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) ((tsk)->thread.lr)
#define KSTK_ESP(tsk) ((tsk)->thread.sp)
#define THREAD_SIZE (2*PAGE_SIZE)
#define cpu_relax() barrier()
#endif /* _ASM_M32R_PROCESSOR_H */
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